/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.eventmesh.connector.jdbc.table.catalog;

import org.apache.eventmesh.connector.jdbc.table.type.EventMeshDataType;
import org.apache.eventmesh.connector.jdbc.table.type.EventMeshTypeNameConverter;
import org.apache.eventmesh.connector.jdbc.type.eventmesh.NullEventMeshDataType;

import org.apache.commons.lang3.StringUtils;

import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

import com.fasterxml.jackson.core.JacksonException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;

public class EventMeshDataTypeJsonDeserializer extends JsonDeserializer<EventMeshDataType> {

    @Override
    public EventMeshDataType deserialize(JsonParser jsonParser, DeserializationContext deserializationContext)
        throws IOException, JacksonException {
        JsonNode treeNode = jsonParser.readValueAsTree();
        Iterator<Entry<String, JsonNode>> fields = treeNode.fields();
        while (fields.hasNext()) {
            Map.Entry<String, JsonNode> field = fields.next();
            if (StringUtils.equals("eventMeshDataType", field.getKey())) {
                String value = field.getValue().asText();
                return EventMeshTypeNameConverter.ofEventMeshDataType(value);
            }
        }
        return NullEventMeshDataType.INSTANCE;
    }
}